Concrete Slab Insert With Flange 1/2″, Zinc, NPSM Threads
https://nsiindustries.com/product/concrete-slab-insert-with-flange-1-2-zinc-npsm-threads/
The Bridgeport 1/2″ Zinc Die Cast Concrete Slab Insert With Flange is ideal for threaded rigid or IMC conduit applications encased in poured or prefabricated concrete slabs. This slab insert features a fitting flange end.